| Item | Part No. | Part Name | Qty | Serial No. |
| 456-841 | VALVE ASS'Y | 8036- | ||
| 458-304 | VALVE ASS'Y | 8001-8035 | ||
| THESE ASSEMBLIES CONSIST OF ALL PARTS SHOWN IN FIGS.Y1661-01A0 TO Y1661-06A0. | ||||
| 1 | 453-633 | O-RING | 8001- | |
| 458-358 | VALVE ASS'Y,SERVICE AND SPEED | 8001- | ||
| 2 | BLOCK,ZG | 8001- | ||
| 457-628 | SPOOL ASS'Y,P.T.O. | 8001- | ||
| 3 | SPOOL,P.T.O. | 8001- | ||
| 4 | 453-637 | O-RING | 8001- | |
| 5 | 455-013 | RING,BACK UP | 8001- | |
| 6 | 454-731 | PLATE | 8001- | |
| 7 | 450-927 | RETAINER | 8001- | |
| 8 | 453-813 | SPRING | 8001- | |
| 9 | 456-688 | BOLT | 8001- | |
| 10 | 457-596 | SPACER | 8001- | |
| 11 | 453-637 | O-RING | 8001- | |
| 12 | 455-013 | RING,BACK UP | 8001- | |
| 13 | 454-731 | PLATE | 8001- | |
| 14 | 455-307 | SCREW | 8001- | |
| 15 | 458-283 | VALVE | 8001- | |
| 16 | 453-812 | SPRING | 8001- | |
| 17 | 453-635 | O-RING | 8001- | |
| 18 | 456-153 | SEAT | 8001- | |
| 19 | 451-837 | COVER | 8001- | |
| 20 | 456-686 | BOLT | 8001- | |
| 21 | 450-745 | PLUG,PF1/4 | 8001- | |
| 458-359 | VALVE ASS'Y,SWING | 8001- | ||
| 22 | BLOCK,ZA | 8001- | ||
| 457-629 | SPOOL ASS'Y,SWING | 8001- | ||
| 23 | SPOOL,SWING | 8001- | ||
| 24 | 453-637 | O-RING | 8001- | |
| 25 | 455-013 | RING,BACK UP | 8001- | |
| 26 | 454-731 | PLATE | 8001- | |
| 27 | 450-927 | RETAINER | 8001- | |
| 28 | 453-813 | SPRING | 8001- | |
| 29 | 456-688 | BOLT | 8001- | |
| 30 | 453-637 | O-RING | 8001- | |
| 31 | 455-013 | RING,BACK UP | 8001- | |
| 32 | 454-731 | PLATE | 8001- | |
| 33 | 455-307 | SCREW | 8001- | |
| 34 | 458-283 | VALVE | 8001- | |
| 35 | 453-812 | SPRING | 8001- | |
| 36 | 453-635 | O-RING | 8001- | |
| 37 | 456-153 | SEAT | 8001- | |
| 38 | 451-837 | COVER | 8001- | |
| 39 | 456-686 | BOLT | 8001- | |
| 40 | 453-638 | O-RING | 8001- | |
| 41 | 453-634 | O-RING | 8001- |